By Tryon, George W. (George Washington), 1838-1888 / Pilsbry, Henry Augustus, b. 1862 . Genre Mollusks / Pulmonata .

By Tryon, George Washington, 1838-1888 . Genre Mollusks . Names pupa / pupilla / type / apex / mus and 5554 more

By Tryon, George W. (George Washington), 1838-1888 / Pilsbry, Henry Augustus, b. 1862 . Genre Pulmonata / Mollusks . Names xx / axis / s g / type / lamella and 6529 more

By Tryon, George Washington, 1838-1888 . Genre Mollusks . Names helix / umbilicus / apex / simple / basal and 3290 more

By Tryon, George W. (George Washington), 1838-1888 / Pilsbry, Henry Augustus, b. 1862 . Genre Pulmonata / Mollusks . Names umbilicus / simple / fer / basal / fesavirus 1 and 3410 more

By Tryon, George W. (George Washington), 1838-1888 / Pilsbry, Henry Augustus, b. 1862 . Genre Pulmonata / Mollusks . Names helix / umbilicus / simple / fer / basal and 3725 more

By Hartman, William Dell, 1817-1899 / Michener, Ezra, 1794-1887 . Genre Mollusks / Pennsylvania / Chester County . Names animal / umbilicus / helix / simple / apex and 986 more

By Tryon, George W. (George Washington), 1838-1888 / Pilsbry, Henry Augustus, b. 1862 . Genre Mollusks / Pulmonata .

By Tryon, George W. (George Washington), 1838-1888 / Pilsbry, Henry Augustus, b. 1862 . Genre Mollusks / Pulmonata . Names umbilicus / trochus / apex / monodonta / fesavirus 1 and 9070 more

By Rafinesque, C. S. (Constantine Samuel), 1783-1840 / Poulson, Charles A. (Charles Augustus), 1789-1866 . Genre n-uso-- / Mollusks / Ohio River / Bivalvia . Names unio / axis / animal / obliquaria / obovaria and 461 more